Question: When did Carlos Fuentes use the alias Emmanuel Matta?
Paraphrase: When did Carlos Fuentes go by Emmanuel Matta?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q154691 p:P742 ?s . ?s ps:P742 ?x filter(contains(?x , 'Emmanuel Matta')) . ?s pq:P582 ?value}